$ git clone -n https://src.fedoraproject.org/rpms/qdox.git /var/lib/mock/f40-build-2136188-50815/root/chroot_tmpdir/scmroot/qdox
Cloning into '/var/lib/mock/f40-build-2136188-50815/root/chroot_tmpdir/scmroot/qdox'...
$ git fetch origin 3b1b51d05b8980a3a5429d86450b1a9a6c3db0ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qdox
 * [new ref]         3b1b51d05b8980a3a5429d86450b1a9a6c3db0ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b1b51d Update javapackages test plan to f40